Steam-actuated valve



(No Model.) 2 Sheets-Sheet 1.

J. H. VAILE.

STEAM AOTUATED VALVE. No. 298,919. Patented May 20, 1884..

N. PETERS. mwwumn m. Wnhmglom n. c.

(No Model.) 2 sheets-Sheet 2. J. H. VAILE.

9 STEAM AGTUATED VALVE. No. 298,919. Patented May 20, 1884.

Aigtesi I UNiTEn firarns PATENT Unmet.

JOHN H. VAILE, F DAYTON, OI-IIO.

STEAlVl ACTUATED VALVE.

PECIFICATION forming part of Letters Patent No. 298,919, dated May 20, 1884..

Application filed July 7. 1983. (No model.)

To (0 whom it may concern.-

Be it known that I, JOHN H. VAILE, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Steam-ActuatedValves, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, making a part of this specification.

The object of my invention is to increase the efficiency and durability of direct-acting steam-pumps, and at the same time to render the construction of the parts simple and easily accessible,- and my improvement consists, particularly, in the location of the supplemental piston, in combination with the main valve, and located to one side of the main valve, with properly-arranged ports, whereby said supplemental piston, under the direct action of live steam, causes the gradual and steady movement of the main valve and of the pump under all conditions; secondly, in the combi nation, with a main valve and its supplemental laterally-located piston, of the extended exhaust, with suitable connections, which serves for both the main valve and its supplemental piston; thirdly, in details of construction and combinations of the parts, as will be herewith set forth and specifically claimed.

In the accompanying drawings, Figure 1, Sheet 1, is a longitudinal sectional view, in elevation, of the main cylinder, main piston, valve, and connecting operating devices. Fig. 2, Sheet 2,is a transverse sectional view taken through the main tube near its center. Fig. 8, Sheet 2, is a sectional plan view of the stcamchest, taken through the line of the valvc-rod. Fig. 4, Sheet 2, is a sectional view, in elevation, through the line 00 m of Figs. 2' and 3.

The same letters of reference are used to in dicate corresponding parts in all the figures.

A is the main cylinder. 13 is the piston working therein.

O is the piston-rod, extending to the pump cylinder or other connecting mechanism. (Not here shown.)

D is the cross-head, rigidly secured to the piston-rod G, and provided with a journaled roller, E, near its upper end, engaging with the concaved under side of the bell-crank F, which is pivoted at G to the framework H, in any suitable manner.

I is a link connecting the upright arm of the bell-crank to the valve-rod. J.

K is the steam-chest, located upon the main cylinder, and having communication therewith through the ports a b, between which is situated the exhaust c.

-L is the usual or any suitable slidc-valve, connected to the rod J in the customary manner, so as to have lost motion.

By reference to Figs. 2 and 3 the construction of the steam-chest will be more readily understood.

To one side of the main-valve seat is asupplemental piston, M, whose ends fit into the recesses N, as shown. This piston is preferably connected by the cross-arm O to the valverod J, which cross-arm also serves to connect the main valve Lto the valve-rod J by having its ends confined between the lugs cl of the valves, as seen in Fig. 3. The exhaust 0 extends under the steam-chest laterally, and has branches 6 projecting at right angles there from under the supplem ental-piston chamber. Ports f connect the supplemental-piston chamher with the branches 6, as seen in'Fig. 4.

Extending into the piston M from each end are bores g, each of which has external communicating passages or ports, h i,respective1y, as clearly shown in Fig. 4.

Between the ports f and the open ends of the suppleinental-piston chamber are cavities j. The ports h i and the openings f and cavities j are in the same plane, which plane may be taken vertically through the axis of the supplemental piston.

From the above construction it will be read ily understood that the operation of the engine is as follows: By reference to Figs. 1 and 3 it will be seen that the piston Bis just about completing its stroke to the right, with the port a receiving live steam, port I) exhausting, and the roller E, which, having been in contact with the bell-crank from the point a and having partially tripped the same, is now in position to complete the throw of the bell-crank by striking its downturned extremity. In this situation of affairs the lost motion of the valve-rod has been taken up, and the supplemental piston, as seen in Figs. 3 and 4, is, so to speak, on a dead-center. The least further motion of the main valve to the left permits the supplemental piston to exhaust on the left through the ports h f, and to take steam at the port i on the right, so that I obtain the employment of live steam to aid the rollerEin completely reversing the main valve, so that steam will enter the port I), and the piston 13 will begin its return-stroke. This reversing of the valve is thus rendered positive, while at the same time it is rendered gradual and steady,by means of the supplemental piston M, which, while taking steam at one end, is being cushioned against steam at its opposite end, owing to the arrangement of its ports and the recesses j, as will be readily understood, and in this manner the stroke of the main valve is at all times controlled and rendered sure and positive, whether the resistance of the pump or other machinery to be actuated be great or small or be constantly removed or reinstated.

By having the supplemental piston arranged within or to one side of the steam-chest a-single cover answers for both, upon the removal of which the operating parts are at once disclosed for cleansing or repairs or for inspection, and by the extension of the main exhaust and its location the construction is greatly piston-rod were used, as will be readily understood.

Having thus fully described my invention, I

I claim- 1. In a pumping-engine, the combination, with the main valve and its ports, of a supplemental piston located to one side, as shown, of said main valve, and united thereto by arigid connection with suitable ports and connecting mechanism, whereby the stroke of said main valve is rendered steady and gradual at all times, substantially as described.

2. In apumping-engine,in combination with the main valve and its rod, the supplemental piston located to one side, as shown, and within the steamchest, said'valve-rod, valve, and piston being united by a rigid connection, and both said valve and piston having suitableinduction and exhaust ports,whereby thestroke of said main valve is rendered steady and gradual at all times.

3. In a pumping-enginehavingamain valve and a laterally controlling supplemental piston united thereto by a rigid connection, a main exhaust extending under and communicating with the valve of the supplemental piston, substantially as described.

' 4. In a pumping-engine, the steam-chest provided with a main valve, a supplementalpiston chamber, N, in which is fitted avalvecontrolling piston united to the main valve by a rigid connection, substantially as described.

5. In a pumping-engine, the combination, with a main piston-rod provided with a crosshead carrying a friction-roller, of the double bell-crank lever F, link I,valve-rod J, and supplemental controlling piston M, located to one side of the valve, as shown, and united thereto and to the valve-rod by arigid connection,the parts being relatively arranged in the manner and for the purpose specified. v JOHN II. VAILE.

Witnesses:

' E. W. Rncron,

JNo. E. WILns. 

